1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * vsp1_drv.c -- R-Car VSP1 Driver
4 *
5 * Copyright (C) 2013-2015 Renesas Electronics Corporation
6 *
7 * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com)
8 */
9
10 #include <linux/clk.h>
11 #include <linux/delay.h>
12 #include <linux/device.h>
13 #include <linux/interrupt.h>
14 #include <linux/module.h>
15 #include <linux/of.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/reset.h>
19 #include <linux/videodev2.h>
20
21 #include <media/rcar-fcp.h>
22 #include <media/v4l2-subdev.h>
23
24 #include "vsp1.h"
25 #include "vsp1_brx.h"
26 #include "vsp1_clu.h"
27 #include "vsp1_dl.h"
28 #include "vsp1_drm.h"
29 #include "vsp1_hgo.h"
30 #include "vsp1_hgt.h"
31 #include "vsp1_hsit.h"
32 #include "vsp1_iif.h"
33 #include "vsp1_lif.h"
34 #include "vsp1_lut.h"
35 #include "vsp1_pipe.h"
36 #include "vsp1_regs.h"
37 #include "vsp1_rwpf.h"
38 #include "vsp1_sru.h"
39 #include "vsp1_uds.h"
40 #include "vsp1_uif.h"
41 #include "vsp1_video.h"
42 #include "vsp1_vspx.h"
43
44 /* -----------------------------------------------------------------------------
45 * Interrupt Handling
46 */
47
vsp1_irq_handler(int irq,void * data)48 static irqreturn_t vsp1_irq_handler(int irq, void *data)
49 {
50 u32 mask = VI6_WPF_IRQ_STA_DFE | VI6_WPF_IRQ_STA_FRE |
51 VI6_WPF_IRQ_STA_UND;
52 struct vsp1_device *vsp1 = data;
53 irqreturn_t ret = IRQ_NONE;
54 unsigned int i;
55 u32 status;
56
57 for (i = 0; i < vsp1->info->wpf_count; ++i) {
58 struct vsp1_rwpf *wpf = vsp1->wpf[i];
59
60 if (wpf == NULL)
61 continue;
62
63 status = vsp1_read(vsp1, VI6_WPF_IRQ_STA(i));
64 vsp1_write(vsp1, VI6_WPF_IRQ_STA(i), ~status & mask);
65
66 if ((status & VI6_WPF_IRQ_STA_UND) && wpf->entity.pipe) {
67 wpf->entity.pipe->underrun_count++;
68
69 dev_warn_ratelimited(vsp1->dev,
70 "Underrun occurred at WPF%u (total underruns %u)\n",
71 i, wpf->entity.pipe->underrun_count);
72 }
73
74 if (status & VI6_WPF_IRQ_STA_DFE) {
75 vsp1_pipeline_frame_end(wpf->entity.pipe);
76 ret = IRQ_HANDLED;
77 }
78 }
79
80 return ret;
81 }
82
83 /* -----------------------------------------------------------------------------
84 * Entities
85 */
86
87 /*
88 * vsp1_create_sink_links - Create links from all sources to the given sink
89 *
90 * This function creates media links from all valid sources to the given sink
91 * pad. Links that would be invalid according to the VSP1 hardware capabilities
92 * are skipped. Those include all links
93 *
94 * - from a UDS to a UDS (UDS entities can't be chained)
95 * - from an entity to itself (no loops are allowed)
96 *
97 * Furthermore, the BRS can't be connected to histogram generators, but no
98 * special check is currently needed as all VSP instances that include a BRS
99 * have no histogram generator.
100 */
vsp1_create_sink_links(struct vsp1_device * vsp1,struct vsp1_entity * sink)101 static int vsp1_create_sink_links(struct vsp1_device *vsp1,
102 struct vsp1_entity *sink)
103 {
104 struct media_entity *entity = &sink->subdev.entity;
105 struct vsp1_entity *source;
106 unsigned int pad;
107 int ret;
108
109 list_for_each_entry(source, &vsp1->entities, list_dev) {
110 u32 flags;
111
112 if (source->type == sink->type)
113 continue;
114
115 if (source->type == VSP1_ENTITY_HGO ||
116 source->type == VSP1_ENTITY_HGT ||
117 source->type == VSP1_ENTITY_LIF ||
118 source->type == VSP1_ENTITY_WPF)
119 continue;
120
121 flags = source->type == VSP1_ENTITY_RPF &&
122 sink->type == VSP1_ENTITY_WPF &&
123 source->index == sink->index
124 ? MEDIA_LNK_FL_ENABLED : 0;
125
126 for (pad = 0; pad < entity->num_pads; ++pad) {
127 if (!(entity->pads[pad].flags & MEDIA_PAD_FL_SINK))
128 continue;
129
130 ret = media_create_pad_link(&source->subdev.entity,
131 source->source_pad,
132 entity, pad, flags);
133 if (ret < 0)
134 return ret;
135
136 if (flags & MEDIA_LNK_FL_ENABLED)
137 source->sink = sink;
138 }
139 }
140
141 return 0;
142 }
143
vsp1_uapi_create_links(struct vsp1_device * vsp1)144 static int vsp1_uapi_create_links(struct vsp1_device *vsp1)
145 {
146 struct vsp1_entity *entity;
147 unsigned int i;
148 int ret;
149
150 list_for_each_entry(entity, &vsp1->entities, list_dev) {
151 if (entity->type == VSP1_ENTITY_LIF ||
152 entity->type == VSP1_ENTITY_RPF)
153 continue;
154
155 ret = vsp1_create_sink_links(vsp1, entity);
156 if (ret < 0)
157 return ret;
158 }
159
160 if (vsp1->hgo) {
161 ret = media_create_pad_link(&vsp1->hgo->histo.entity.subdev.entity,
162 HISTO_PAD_SOURCE,
163 &vsp1->hgo->histo.video.entity, 0,
164 MEDIA_LNK_FL_ENABLED |
165 MEDIA_LNK_FL_IMMUTABLE);
166 if (ret < 0)
167 return ret;
168 }
169
170 if (vsp1->hgt) {
171 ret = media_create_pad_link(&vsp1->hgt->histo.entity.subdev.entity,
172 HISTO_PAD_SOURCE,
173 &vsp1->hgt->histo.video.entity, 0,
174 MEDIA_LNK_FL_ENABLED |
175 MEDIA_LNK_FL_IMMUTABLE);
176 if (ret < 0)
177 return ret;
178 }
179
180 for (i = 0; i < vsp1->info->lif_count; ++i) {
181 if (!vsp1->lif[i])
182 continue;
183
184 ret = media_create_pad_link(&vsp1->wpf[i]->entity.subdev.entity,
185 RWPF_PAD_SOURCE,
186 &vsp1->lif[i]->entity.subdev.entity,
187 LIF_PAD_SINK, 0);
188 if (ret < 0)
189 return ret;
190 }
191
192 for (i = 0; i < vsp1->info->rpf_count; ++i) {
193 struct vsp1_rwpf *rpf = vsp1->rpf[i];
194
195 ret = media_create_pad_link(&rpf->video->video.entity, 0,
196 &rpf->entity.subdev.entity,
197 RWPF_PAD_SINK,
198 MEDIA_LNK_FL_ENABLED |
199 MEDIA_LNK_FL_IMMUTABLE);
200 if (ret < 0)
201 return ret;
202 }
203
204 for (i = 0; i < vsp1->info->wpf_count; ++i) {
205 /*
206 * Connect the video device to the WPF. All connections are
207 * immutable.
208 */
209 struct vsp1_rwpf *wpf = vsp1->wpf[i];
210
211 ret = media_create_pad_link(&wpf->entity.subdev.entity,
212 RWPF_PAD_SOURCE,
213 &wpf->video->video.entity, 0,
214 MEDIA_LNK_FL_IMMUTABLE |
215 MEDIA_LNK_FL_ENABLED);
216 if (ret < 0)
217 return ret;
218 }
219
220 return 0;
221 }
222
vsp1_destroy_entities(struct vsp1_device * vsp1)223 static void vsp1_destroy_entities(struct vsp1_device *vsp1)
224 {
225 struct vsp1_entity *entity, *_entity;
226 struct vsp1_video *video, *_video;
227
228 list_for_each_entry_safe(entity, _entity, &vsp1->entities, list_dev) {
229 list_del(&entity->list_dev);
230 vsp1_entity_destroy(entity);
231 }
232
233 list_for_each_entry_safe(video, _video, &vsp1->videos, list) {
234 list_del(&video->list);
235 vsp1_video_cleanup(video);
236 }
237
238 v4l2_device_unregister(&vsp1->v4l2_dev);
239 if (vsp1->info->uapi)
240 media_device_unregister(&vsp1->media_dev);
241 media_device_cleanup(&vsp1->media_dev);
242
243 if (!vsp1->info->uapi)
244 vsp1_drm_cleanup(vsp1);
245 }
246
vsp1_create_entities(struct vsp1_device * vsp1)247 static int vsp1_create_entities(struct vsp1_device *vsp1)
248 {
249 struct media_device *mdev = &vsp1->media_dev;
250 struct v4l2_device *vdev = &vsp1->v4l2_dev;
251 struct vsp1_entity *entity;
252 unsigned int i;
253 int ret;
254
255 mdev->dev = vsp1->dev;
256 mdev->hw_revision = vsp1->version;
257 strscpy(mdev->model, vsp1->info->model, sizeof(mdev->model));
258 media_device_init(mdev);
259
260 vsp1->media_ops.link_setup = vsp1_entity_link_setup;
261 /*
262 * Don't perform link validation when the userspace API is disabled as
263 * the pipeline is configured internally by the driver in that case, and
264 * its configuration can thus be trusted.
265 */
266 if (vsp1->info->uapi)
267 vsp1->media_ops.link_validate = v4l2_subdev_link_validate;
268
269 vdev->mdev = mdev;
270 ret = v4l2_device_register(vsp1->dev, vdev);
271 if (ret < 0) {
272 dev_err(vsp1->dev, "V4L2 device registration failed (%d)\n",
273 ret);
274 goto done;
275 }
276
277 /* Instantiate all the entities. */
278 if (vsp1_feature(vsp1, VSP1_HAS_BRS)) {
279 vsp1->brs = vsp1_brx_create(vsp1, VSP1_ENTITY_BRS);
280 if (IS_ERR(vsp1->brs)) {
281 ret = PTR_ERR(vsp1->brs);
282 goto done;
283 }
284
285 list_add_tail(&vsp1->brs->entity.list_dev, &vsp1->entities);
286 }
287
288 if (vsp1_feature(vsp1, VSP1_HAS_BRU)) {
289 vsp1->bru = vsp1_brx_create(vsp1, VSP1_ENTITY_BRU);
290 if (IS_ERR(vsp1->bru)) {
291 ret = PTR_ERR(vsp1->bru);
292 goto done;
293 }
294
295 list_add_tail(&vsp1->bru->entity.list_dev, &vsp1->entities);
296 }
297
298 if (vsp1_feature(vsp1, VSP1_HAS_CLU)) {
299 vsp1->clu = vsp1_clu_create(vsp1);
300 if (IS_ERR(vsp1->clu)) {
301 ret = PTR_ERR(vsp1->clu);
302 goto done;
303 }
304
305 list_add_tail(&vsp1->clu->entity.list_dev, &vsp1->entities);
306 }
307
308 if (vsp1_feature(vsp1, VSP1_HAS_HGO) && vsp1->info->uapi) {
309 vsp1->hgo = vsp1_hgo_create(vsp1);
310 if (IS_ERR(vsp1->hgo)) {
311 ret = PTR_ERR(vsp1->hgo);
312 goto done;
313 }
314
315 list_add_tail(&vsp1->hgo->histo.entity.list_dev,
316 &vsp1->entities);
317 }
318
319 if (vsp1_feature(vsp1, VSP1_HAS_HGT) && vsp1->info->uapi) {
320 vsp1->hgt = vsp1_hgt_create(vsp1);
321 if (IS_ERR(vsp1->hgt)) {
322 ret = PTR_ERR(vsp1->hgt);
323 goto done;
324 }
325
326 list_add_tail(&vsp1->hgt->histo.entity.list_dev,
327 &vsp1->entities);
328 }
329
330 if (vsp1_feature(vsp1, VSP1_HAS_IIF)) {
331 vsp1->iif = vsp1_iif_create(vsp1);
332 if (IS_ERR(vsp1->iif)) {
333 ret = PTR_ERR(vsp1->iif);
334 goto done;
335 }
336
337 list_add_tail(&vsp1->iif->entity.list_dev, &vsp1->entities);
338 }
339
340 if (vsp1_feature(vsp1, VSP1_HAS_HSIT)) {
341 vsp1->hsi = vsp1_hsit_create(vsp1, true);
342 if (IS_ERR(vsp1->hsi)) {
343 ret = PTR_ERR(vsp1->hsi);
344 goto done;
345 }
346
347 list_add_tail(&vsp1->hsi->entity.list_dev, &vsp1->entities);
348
349 vsp1->hst = vsp1_hsit_create(vsp1, false);
350 if (IS_ERR(vsp1->hst)) {
351 ret = PTR_ERR(vsp1->hst);
352 goto done;
353 }
354
355 list_add_tail(&vsp1->hst->entity.list_dev, &vsp1->entities);
356 }
357
358 /*
359 * The LIFs are only supported when used in conjunction with the DU, in
360 * which case the userspace API is disabled. If the userspace API is
361 * enabled skip the LIFs, even when present.
362 */
363 if (!vsp1->info->uapi) {
364 for (i = 0; i < vsp1->info->lif_count; ++i) {
365 struct vsp1_lif *lif;
366
367 lif = vsp1_lif_create(vsp1, i);
368 if (IS_ERR(lif)) {
369 ret = PTR_ERR(lif);
370 goto done;
371 }
372
373 vsp1->lif[i] = lif;
374 list_add_tail(&lif->entity.list_dev, &vsp1->entities);
375 }
376 }
377
378 if (vsp1_feature(vsp1, VSP1_HAS_LUT)) {
379 vsp1->lut = vsp1_lut_create(vsp1);
380 if (IS_ERR(vsp1->lut)) {
381 ret = PTR_ERR(vsp1->lut);
382 goto done;
383 }
384
385 list_add_tail(&vsp1->lut->entity.list_dev, &vsp1->entities);
386 }
387
388 for (i = 0; i < vsp1->info->rpf_count; ++i) {
389 struct vsp1_rwpf *rpf;
390
391 rpf = vsp1_rpf_create(vsp1, i);
392 if (IS_ERR(rpf)) {
393 ret = PTR_ERR(rpf);
394 goto done;
395 }
396
397 vsp1->rpf[i] = rpf;
398 list_add_tail(&rpf->entity.list_dev, &vsp1->entities);
399
400 if (vsp1->info->uapi) {
401 struct vsp1_video *video = vsp1_video_create(vsp1, rpf);
402
403 if (IS_ERR(video)) {
404 ret = PTR_ERR(video);
405 goto done;
406 }
407
408 list_add_tail(&video->list, &vsp1->videos);
409 }
410 }
411
412 if (vsp1_feature(vsp1, VSP1_HAS_SRU)) {
413 vsp1->sru = vsp1_sru_create(vsp1);
414 if (IS_ERR(vsp1->sru)) {
415 ret = PTR_ERR(vsp1->sru);
416 goto done;
417 }
418
419 list_add_tail(&vsp1->sru->entity.list_dev, &vsp1->entities);
420 }
421
422 for (i = 0; i < vsp1->info->uds_count; ++i) {
423 struct vsp1_uds *uds;
424
425 uds = vsp1_uds_create(vsp1, i);
426 if (IS_ERR(uds)) {
427 ret = PTR_ERR(uds);
428 goto done;
429 }
430
431 vsp1->uds[i] = uds;
432 list_add_tail(&uds->entity.list_dev, &vsp1->entities);
433 }
434
435 for (i = 0; i < vsp1->info->uif_count; ++i) {
436 struct vsp1_uif *uif;
437
438 uif = vsp1_uif_create(vsp1, i);
439 if (IS_ERR(uif)) {
440 ret = PTR_ERR(uif);
441 goto done;
442 }
443
444 vsp1->uif[i] = uif;
445 list_add_tail(&uif->entity.list_dev, &vsp1->entities);
446 }
447
448 for (i = 0; i < vsp1->info->wpf_count; ++i) {
449 struct vsp1_rwpf *wpf;
450
451 wpf = vsp1_wpf_create(vsp1, i);
452 if (IS_ERR(wpf)) {
453 ret = PTR_ERR(wpf);
454 goto done;
455 }
456
457 vsp1->wpf[i] = wpf;
458 list_add_tail(&wpf->entity.list_dev, &vsp1->entities);
459
460 if (vsp1->info->uapi) {
461 struct vsp1_video *video = vsp1_video_create(vsp1, wpf);
462
463 if (IS_ERR(video)) {
464 ret = PTR_ERR(video);
465 goto done;
466 }
467
468 list_add_tail(&video->list, &vsp1->videos);
469 }
470 }
471
472 /* Register all subdevs. */
473 list_for_each_entry(entity, &vsp1->entities, list_dev) {
474 ret = v4l2_device_register_subdev(&vsp1->v4l2_dev,
475 &entity->subdev);
476 if (ret < 0)
477 goto done;
478 }
479
480 /*
481 * Create links and register subdev nodes if the userspace API is
482 * enabled or initialize the DRM pipeline otherwise.
483 */
484 if (vsp1->info->uapi) {
485 ret = vsp1_uapi_create_links(vsp1);
486 if (ret < 0)
487 goto done;
488
489 ret = v4l2_device_register_subdev_nodes(&vsp1->v4l2_dev);
490 if (ret < 0)
491 goto done;
492
493 ret = media_device_register(mdev);
494 } else {
495 if (vsp1->info->version == VI6_IP_VERSION_MODEL_VSPX_GEN4)
496 ret = vsp1_vspx_init(vsp1);
497 else
498 ret = vsp1_drm_init(vsp1);
499 }
500
501 done:
502 if (ret < 0)
503 vsp1_destroy_entities(vsp1);
504
505 return ret;
506 }
507
vsp1_reset_wpf(struct vsp1_device * vsp1,unsigned int index)508 int vsp1_reset_wpf(struct vsp1_device *vsp1, unsigned int index)
509 {
510 u32 version = vsp1->version & VI6_IP_VERSION_MODEL_MASK;
511 unsigned int timeout;
512 int ret = 0;
513 u32 status;
514
515 status = vsp1_read(vsp1, VI6_STATUS);
516 if (!(status & VI6_STATUS_SYS_ACT(index)))
517 return 0;
518
519 vsp1_write(vsp1, VI6_SRESET, VI6_SRESET_SRTS(index));
520 for (timeout = 10; timeout > 0; --timeout) {
521 status = vsp1_read(vsp1, VI6_STATUS);
522 if (!(status & VI6_STATUS_SYS_ACT(index)))
523 break;
524
525 usleep_range(1000, 2000);
526 }
527
528 if (!timeout) {
529 dev_err(vsp1->dev, "failed to reset wpf.%u\n", index);
530 return -ETIMEDOUT;
531 }
532
533 if (version == VI6_IP_VERSION_MODEL_VSPD_GEN3 ||
534 version == VI6_IP_VERSION_MODEL_VSPD_GEN4)
535 ret = rcar_fcp_soft_reset(vsp1->fcp);
536
537 return ret;
538 }
539
vsp1_device_init(struct vsp1_device * vsp1)540 static int vsp1_device_init(struct vsp1_device *vsp1)
541 {
542 unsigned int i;
543 int ret;
544
545 /* Reset any channel that might be running. */
546 for (i = 0; i < vsp1->info->wpf_count; ++i) {
547 ret = vsp1_reset_wpf(vsp1, i);
548 if (ret < 0)
549 return ret;
550 }
551
552 vsp1_write(vsp1, VI6_CLK_DCSWT, (8 << VI6_CLK_DCSWT_CSTPW_SHIFT) |
553 (8 << VI6_CLK_DCSWT_CSTRW_SHIFT));
554
555 for (i = 0; i < vsp1->info->rpf_count; ++i)
556 vsp1_write(vsp1, VI6_DPR_RPF_ROUTE(i), VI6_DPR_NODE_UNUSED);
557
558 for (i = 0; i < vsp1->info->uds_count; ++i)
559 vsp1_write(vsp1, VI6_DPR_UDS_ROUTE(i), VI6_DPR_NODE_UNUSED);
560
561 for (i = 0; i < vsp1->info->uif_count; ++i)
562 vsp1_write(vsp1, VI6_DPR_UIF_ROUTE(i), VI6_DPR_NODE_UNUSED);
563
564 vsp1_write(vsp1, VI6_DPR_SRU_ROUTE, VI6_DPR_NODE_UNUSED);
565 vsp1_write(vsp1, VI6_DPR_LUT_ROUTE, VI6_DPR_NODE_UNUSED);
566 vsp1_write(vsp1, VI6_DPR_CLU_ROUTE, VI6_DPR_NODE_UNUSED);
567 vsp1_write(vsp1, VI6_DPR_HST_ROUTE, VI6_DPR_NODE_UNUSED);
568 vsp1_write(vsp1, VI6_DPR_HSI_ROUTE, VI6_DPR_NODE_UNUSED);
569 vsp1_write(vsp1, VI6_DPR_BRU_ROUTE, VI6_DPR_NODE_UNUSED);
570
571 if (vsp1_feature(vsp1, VSP1_HAS_BRS))
572 vsp1_write(vsp1, VI6_DPR_ILV_BRS_ROUTE, VI6_DPR_NODE_UNUSED);
573
574 vsp1_write(vsp1, VI6_DPR_HGO_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
575 (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
576 vsp1_write(vsp1, VI6_DPR_HGT_SMPPT, (7 << VI6_DPR_SMPPT_TGW_SHIFT) |
577 (VI6_DPR_NODE_UNUSED << VI6_DPR_SMPPT_PT_SHIFT));
578
579 vsp1_dlm_setup(vsp1);
580
581 return 0;
582 }
583
vsp1_mask_all_interrupts(struct vsp1_device * vsp1)584 static void vsp1_mask_all_interrupts(struct vsp1_device *vsp1)
585 {
586 unsigned int i;
587
588 for (i = 0; i < vsp1->info->lif_count; ++i)
589 vsp1_write(vsp1, VI6_DISP_IRQ_ENB(i), 0);
590 for (i = 0; i < vsp1->info->wpf_count; ++i)
591 vsp1_write(vsp1, VI6_WPF_IRQ_ENB(i), 0);
592 }
593
594 /*
595 * vsp1_device_get - Acquire the VSP1 device
596 *
597 * Make sure the device is not suspended and initialize it if needed.
598 *
599 * Return 0 on success or a negative error code otherwise.
600 */
vsp1_device_get(struct vsp1_device * vsp1)601 int vsp1_device_get(struct vsp1_device *vsp1)
602 {
603 return pm_runtime_resume_and_get(vsp1->dev);
604 }
605
606 /*
607 * vsp1_device_put - Release the VSP1 device
608 *
609 * Decrement the VSP1 reference count and cleanup the device if the last
610 * reference is released.
611 */
vsp1_device_put(struct vsp1_device * vsp1)612 void vsp1_device_put(struct vsp1_device *vsp1)
613 {
614 pm_runtime_put_sync(vsp1->dev);
615 }
616
617 /* -----------------------------------------------------------------------------
618 * Power Management
619 */
620
vsp1_pm_suspend(struct device * dev)621 static int __maybe_unused vsp1_pm_suspend(struct device *dev)
622 {
623 struct vsp1_device *vsp1 = dev_get_drvdata(dev);
624
625 /*
626 * When used as part of a display pipeline, the VSP is stopped and
627 * restarted explicitly by the DU.
628 */
629 if (!vsp1->drm)
630 vsp1_video_suspend(vsp1);
631
632 pm_runtime_force_suspend(vsp1->dev);
633
634 return 0;
635 }
636
vsp1_pm_resume(struct device * dev)637 static int __maybe_unused vsp1_pm_resume(struct device *dev)
638 {
639 struct vsp1_device *vsp1 = dev_get_drvdata(dev);
640
641 pm_runtime_force_resume(vsp1->dev);
642
643 /*
644 * When used as part of a display pipeline, the VSP is stopped and
645 * restarted explicitly by the DU.
646 */
647 if (!vsp1->drm)
648 vsp1_video_resume(vsp1);
649
650 return 0;
651 }
652
vsp1_pm_runtime_suspend(struct device * dev)653 static int __maybe_unused vsp1_pm_runtime_suspend(struct device *dev)
654 {
655 struct vsp1_device *vsp1 = dev_get_drvdata(dev);
656
657 rcar_fcp_disable(vsp1->fcp);
658 reset_control_assert(vsp1->rstc);
659
660 return 0;
661 }
662
vsp1_pm_runtime_resume(struct device * dev)663 static int __maybe_unused vsp1_pm_runtime_resume(struct device *dev)
664 {
665 struct vsp1_device *vsp1 = dev_get_drvdata(dev);
666 int ret;
667
668 ret = reset_control_deassert(vsp1->rstc);
669 if (ret < 0)
670 return ret;
671
672 if (vsp1->info) {
673 /*
674 * On R-Car Gen2 and RZ/G1, vsp1 register access after deassert
675 * can cause lock-up. It is a special case and needs some delay
676 * to avoid this lock-up.
677 */
678 if (vsp1->info->gen == 2)
679 udelay(1);
680
681 ret = vsp1_device_init(vsp1);
682 if (ret < 0)
683 goto done;
684 }
685
686 ret = rcar_fcp_enable(vsp1->fcp);
687
688 done:
689 if (ret < 0)
690 reset_control_assert(vsp1->rstc);
691
692 return ret;
693 }
694
695 static const struct dev_pm_ops vsp1_pm_ops = {
696 SET_SYSTEM_SLEEP_PM_OPS(vsp1_pm_suspend, vsp1_pm_resume)
697 SET_RUNTIME_PM_OPS(vsp1_pm_runtime_suspend, vsp1_pm_runtime_resume, NULL)
698 };
699
700 /* -----------------------------------------------------------------------------
701 * Platform Driver
702 */
703
704 static const struct vsp1_device_info vsp1_device_infos[] = {
705 {
706 .version = VI6_IP_VERSION_MODEL_VSPS_H2,
707 .model = "VSP1-S",
708 .gen = 2,
709 .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_HGO
710 | VSP1_HAS_HGT | VSP1_HAS_HSIT | VSP1_HAS_LUT
711 | VSP1_HAS_SRU | VSP1_HAS_WPF_VFLIP,
712 .rpf_count = 5,
713 .uds_count = 3,
714 .wpf_count = 4,
715 .num_bru_inputs = 4,
716 .uapi = true,
717 }, {
718 .version = VI6_IP_VERSION_MODEL_VSPR_H2,
719 .model = "VSP1-R",
720 .gen = 2,
721 .features = VSP1_HAS_BRU | VSP1_HAS_HSIT | VSP1_HAS_SRU
722 | VSP1_HAS_WPF_VFLIP,
723 .rpf_count = 5,
724 .uds_count = 3,
725 .wpf_count = 4,
726 .num_bru_inputs = 4,
727 .uapi = true,
728 }, {
729 .version = VI6_IP_VERSION_MODEL_VSPD_GEN2,
730 .model = "VSP1-D",
731 .gen = 2,
732 .features = VSP1_HAS_BRU | VSP1_HAS_HGO | VSP1_HAS_HSIT
733 | VSP1_HAS_LUT,
734 .lif_count = 1,
735 .rpf_count = 4,
736 .uds_count = 1,
737 .wpf_count = 1,
738 .num_bru_inputs = 4,
739 .uapi = true,
740 }, {
741 .version = VI6_IP_VERSION_MODEL_VSPS_M2,
742 .model = "VSP1-S",
743 .gen = 2,
744 .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_HGO
745 | VSP1_HAS_HGT | VSP1_HAS_HSIT | VSP1_HAS_LUT
746 | VSP1_HAS_SRU | VSP1_HAS_WPF_VFLIP,
747 .rpf_count = 5,
748 .uds_count = 1,
749 .wpf_count = 4,
750 .num_bru_inputs = 4,
751 .uapi = true,
752 }, {
753 .version = VI6_IP_VERSION_MODEL_VSPS_V2H,
754 .model = "VSP1V-S",
755 .gen = 2,
756 .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_HSIT
757 | VSP1_HAS_LUT | VSP1_HAS_SRU | VSP1_HAS_WPF_VFLIP,
758 .rpf_count = 4,
759 .uds_count = 1,
760 .wpf_count = 4,
761 .num_bru_inputs = 4,
762 .uapi = true,
763 }, {
764 .version = VI6_IP_VERSION_MODEL_VSPD_V2H,
765 .model = "VSP1V-D",
766 .gen = 2,
767 .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_HSIT
768 | VSP1_HAS_LUT,
769 .lif_count = 1,
770 .rpf_count = 4,
771 .uds_count = 1,
772 .wpf_count = 1,
773 .num_bru_inputs = 4,
774 .uapi = true,
775 }, {
776 .version = VI6_IP_VERSION_MODEL_VSPI_GEN3,
777 .model = "VSP2-I",
778 .gen = 3,
779 .features = VSP1_HAS_CLU | VSP1_HAS_HGO | VSP1_HAS_HGT
780 | VSP1_HAS_HSIT | VSP1_HAS_LUT | VSP1_HAS_SRU
781 | VSP1_HAS_WPF_HFLIP | VSP1_HAS_WPF_VFLIP,
782 .rpf_count = 1,
783 .uds_count = 1,
784 .wpf_count = 1,
785 .uapi = true,
786 }, {
787 .version = VI6_IP_VERSION_MODEL_VSPBD_GEN3,
788 .model = "VSP2-BD",
789 .gen = 3,
790 .features = VSP1_HAS_BRU | VSP1_HAS_WPF_VFLIP,
791 .rpf_count = 5,
792 .wpf_count = 1,
793 .num_bru_inputs = 5,
794 .uapi = true,
795 }, {
796 .version = VI6_IP_VERSION_MODEL_VSPBC_GEN3,
797 .model = "VSP2-BC",
798 .gen = 3,
799 .features = VSP1_HAS_BRU | VSP1_HAS_CLU | VSP1_HAS_HGO
800 | VSP1_HAS_LUT | VSP1_HAS_WPF_VFLIP,
801 .rpf_count = 5,
802 .wpf_count = 1,
803 .num_bru_inputs = 5,
804 .uapi = true,
805 }, {
806 .version = VI6_IP_VERSION_MODEL_VSPBS_GEN3,
807 .model = "VSP2-BS",
808 .gen = 3,
809 .features = VSP1_HAS_BRS | VSP1_HAS_WPF_VFLIP,
810 .rpf_count = 2,
811 .wpf_count = 1,
812 .uapi = true,
813 }, {
814 .version = VI6_IP_VERSION_MODEL_VSPD_GEN3,
815 .model = "VSP2-D",
816 .gen = 3,
817 .features = VSP1_HAS_BRU | VSP1_HAS_WPF_VFLIP | VSP1_HAS_EXT_DL,
818 .lif_count = 1,
819 .rpf_count = 5,
820 .uif_count = 1,
821 .wpf_count = 2,
822 .num_bru_inputs = 5,
823 }, {
824 .version = VI6_IP_VERSION_MODEL_VSPD_V3,
825 .model = "VSP2-D",
826 .soc = VI6_IP_VERSION_SOC_V3H,
827 .gen = 3,
828 .features = VSP1_HAS_BRS | VSP1_HAS_BRU,
829 .lif_count = 1,
830 .rpf_count = 5,
831 .uif_count = 1,
832 .wpf_count = 1,
833 .num_bru_inputs = 5,
834 }, {
835 .version = VI6_IP_VERSION_MODEL_VSPD_V3,
836 .model = "VSP2-D",
837 .soc = VI6_IP_VERSION_SOC_V3M,
838 .gen = 3,
839 .features = VSP1_HAS_BRS | VSP1_HAS_BRU | VSP1_HAS_NON_ZERO_LBA,
840 .lif_count = 1,
841 .rpf_count = 5,
842 .uif_count = 1,
843 .wpf_count = 1,
844 .num_bru_inputs = 5,
845 }, {
846 .version = VI6_IP_VERSION_MODEL_VSPDL_GEN3,
847 .model = "VSP2-DL",
848 .gen = 3,
849 .features = VSP1_HAS_BRS | VSP1_HAS_BRU | VSP1_HAS_EXT_DL,
850 .lif_count = 2,
851 .rpf_count = 5,
852 .uif_count = 2,
853 .wpf_count = 2,
854 .num_bru_inputs = 5,
855 }, {
856 .version = VI6_IP_VERSION_MODEL_VSPD_GEN4,
857 .model = "VSP2-D",
858 .gen = 4,
859 .features = VSP1_HAS_BRU | VSP1_HAS_EXT_DL,
860 .lif_count = 1,
861 .rpf_count = 5,
862 .uif_count = 2,
863 .wpf_count = 1,
864 .num_bru_inputs = 5,
865 }, {
866 .version = VI6_IP_VERSION_MODEL_VSPX_GEN4,
867 .model = "VSP2-X",
868 .gen = 4,
869 .features = VSP1_HAS_IIF,
870 .rpf_count = 2,
871 .wpf_count = 1,
872 },
873 };
874
875 static const struct vsp1_device_info rzg2l_vsp2_device_info = {
876 .version = VI6_IP_VERSION_MODEL_VSPD_RZG2L,
877 .model = "VSP2-D",
878 .soc = VI6_IP_VERSION_SOC_RZG2L,
879 .gen = 3,
880 .features = VSP1_HAS_BRS | VSP1_HAS_WPF_VFLIP | VSP1_HAS_EXT_DL
881 | VSP1_HAS_NON_ZERO_LBA,
882 .lif_count = 1,
883 .rpf_count = 2,
884 .wpf_count = 1,
885 };
886
vsp1_lookup_info(struct vsp1_device * vsp1)887 static const struct vsp1_device_info *vsp1_lookup_info(struct vsp1_device *vsp1)
888 {
889 const struct vsp1_device_info *info;
890 unsigned int i;
891 u32 model;
892 u32 soc;
893
894 /*
895 * Try the info stored in match data first for devices that don't have
896 * a version register.
897 */
898 info = of_device_get_match_data(vsp1->dev);
899 if (info) {
900 vsp1->version = VI6_IP_VERSION_VSP_SW | info->version | info->soc;
901 return info;
902 }
903
904 vsp1->version = vsp1_read(vsp1, VI6_IP_VERSION);
905 model = vsp1->version & VI6_IP_VERSION_MODEL_MASK;
906 soc = vsp1->version & VI6_IP_VERSION_SOC_MASK;
907
908 for (i = 0; i < ARRAY_SIZE(vsp1_device_infos); ++i) {
909 info = &vsp1_device_infos[i];
910
911 if (model == info->version && (!info->soc || soc == info->soc))
912 return info;
913 }
914
915 dev_err(vsp1->dev, "unsupported IP version 0x%08x\n", vsp1->version);
916
917 return NULL;
918 }
919
vsp1_probe(struct platform_device * pdev)920 static int vsp1_probe(struct platform_device *pdev)
921 {
922 struct vsp1_device *vsp1;
923 struct device_node *fcp_node;
924 int ret;
925 int irq;
926
927 vsp1 = devm_kzalloc(&pdev->dev, sizeof(*vsp1), GFP_KERNEL);
928 if (vsp1 == NULL)
929 return -ENOMEM;
930
931 vsp1->dev = &pdev->dev;
932 INIT_LIST_HEAD(&vsp1->entities);
933 INIT_LIST_HEAD(&vsp1->videos);
934
935 platform_set_drvdata(pdev, vsp1);
936
937 /* I/O and IRQ resources (clock managed by the clock PM domain). */
938 vsp1->mmio = devm_platform_ioremap_resource(pdev, 0);
939 if (IS_ERR(vsp1->mmio))
940 return PTR_ERR(vsp1->mmio);
941
942 irq = platform_get_irq(pdev, 0);
943 if (irq < 0)
944 return irq;
945
946 vsp1->rstc = devm_reset_control_get_shared(&pdev->dev, NULL);
947 if (IS_ERR(vsp1->rstc))
948 return dev_err_probe(&pdev->dev, PTR_ERR(vsp1->rstc),
949 "failed to get reset control\n");
950
951 /* FCP (optional). */
952 fcp_node = of_parse_phandle(pdev->dev.of_node, "renesas,fcp", 0);
953 if (fcp_node) {
954 vsp1->fcp = rcar_fcp_get(fcp_node);
955 of_node_put(fcp_node);
956 if (IS_ERR(vsp1->fcp)) {
957 dev_dbg(&pdev->dev, "FCP not found (%ld)\n",
958 PTR_ERR(vsp1->fcp));
959 return PTR_ERR(vsp1->fcp);
960 }
961
962 /*
963 * When the FCP is present, it handles all bus master accesses
964 * for the VSP and must thus be used in place of the VSP device
965 * to map DMA buffers.
966 */
967 vsp1->bus_master = rcar_fcp_get_device(vsp1->fcp);
968 } else {
969 vsp1->bus_master = vsp1->dev;
970 }
971
972 /* Configure device parameters based on the version register. */
973 pm_runtime_enable(&pdev->dev);
974
975 ret = vsp1_device_get(vsp1);
976 if (ret < 0)
977 goto done;
978
979 vsp1->info = vsp1_lookup_info(vsp1);
980 if (!vsp1->info) {
981 vsp1_device_put(vsp1);
982 ret = -ENXIO;
983 goto done;
984 }
985
986 dev_dbg(&pdev->dev, "IP version 0x%08x\n", vsp1->version);
987
988 /*
989 * Previous use of the hardware (e.g. by the bootloader) could leave
990 * some interrupts enabled and pending.
991 *
992 * TODO: Investigate if this shouldn't be better handled by using the
993 * device reset provided by the CPG.
994 */
995 vsp1_mask_all_interrupts(vsp1);
996
997 vsp1_device_put(vsp1);
998
999 ret = devm_request_irq(&pdev->dev, irq, vsp1_irq_handler,
1000 IRQF_SHARED, dev_name(&pdev->dev), vsp1);
1001 if (ret < 0) {
1002 dev_err(&pdev->dev, "failed to request IRQ\n");
1003 goto done;
1004 }
1005
1006 /* Instantiate entities. */
1007 ret = vsp1_create_entities(vsp1);
1008 if (ret < 0) {
1009 dev_err(&pdev->dev, "failed to create entities\n");
1010 goto done;
1011 }
1012
1013 done:
1014 if (ret) {
1015 pm_runtime_disable(&pdev->dev);
1016 rcar_fcp_put(vsp1->fcp);
1017 }
1018
1019 return ret;
1020 }
1021
vsp1_remove(struct platform_device * pdev)1022 static void vsp1_remove(struct platform_device *pdev)
1023 {
1024 struct vsp1_device *vsp1 = platform_get_drvdata(pdev);
1025
1026 vsp1_destroy_entities(vsp1);
1027 rcar_fcp_put(vsp1->fcp);
1028
1029 pm_runtime_disable(&pdev->dev);
1030 }
1031
1032 static const struct of_device_id vsp1_of_match[] = {
1033 { .compatible = "renesas,vsp1" },
1034 { .compatible = "renesas,vsp2" },
1035 { .compatible = "renesas,r9a07g044-vsp2", .data = &rzg2l_vsp2_device_info },
1036 { },
1037 };
1038 MODULE_DEVICE_TABLE(of, vsp1_of_match);
1039
1040 static struct platform_driver vsp1_platform_driver = {
1041 .probe = vsp1_probe,
1042 .remove = vsp1_remove,
1043 .driver = {
1044 .name = "vsp1",
1045 .pm = &vsp1_pm_ops,
1046 .of_match_table = vsp1_of_match,
1047 },
1048 };
1049
1050 module_platform_driver(vsp1_platform_driver);
1051
1052 MODULE_ALIAS("vsp1");
1053 MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
1054 MODULE_DESCRIPTION("Renesas VSP1 Driver");
1055 MODULE_LICENSE("GPL");
1056